Two Sedans with some similarities, but otherwise different in most aspects such as the model year, modifications, maximum occupancy, horsepower, fuel economy, ground shadow size, and height. First of all, the 2013 E-Class Sedan E63 AMG has a more powerful engine and gets 2 mpg less than the 2016 S7. Also, although the S7 is slightly larger, it has a shorter body than the E-Class Sedan E63 AMG. In addition, you'll seat three more passengers in the Mercedes-Benz E-Class Sedan E63 AMG than in the Audi S7. Among similarities are the body structure, market segment, and starting price.